gnu: Add emacs-helm-pass.

* gnu/packages/emacs.scm (emacs-helm-pass): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/emacs.scm

@@ -11118,3 +11118,36 @@ Emacs build on top of mu.  Mu is highly efficient making it possible to get
 instant results even for huge maildirs.  It also provides search operators,
 e.g: @code{from:Peter to:Anne flag:attach search term}.")
       (license license:gpl3+))))
+
+(define-public emacs-helm-pass
+  (let ((commit "ebcbef1a962795a36e3491ae926e2a4b8a8b0ebb"))
+    (package
+      (name "emacs-helm-pass")
+      (version (git-version  "20180416" "1" commit))
+      (source
+       (origin
+         (method url-fetch)
+         (uri (string-append
+               "https://github.com/jabranham/helm-pass/archive/"
+               commit
+               ".tar.gz"))
+         (sha256
+          (base32
+           "1pgq4hj9wvz7z2fyxwsvbh6rmc1akya84v382nx26rr76iavz6wi"))))
+      (build-system emacs-build-system)
+      (propagated-inputs
+       `(("emacs-helm" ,emacs-helm)
+         ("emacs-password-store" ,emacs-password-store)))
+      (home-page
+       "https://github.com/jabranham/helm-pass")
+      (synopsis "Helm interface to pass, the standard Unix password manager")
+      (description
+       "Users of @code{helm-pass} may also be interested in functionality
+provided by other Emacs packages dealing with pass:
+@itemize
+@item @code{emacs-password-store}, which @code{helm-pass} relies on.
+@item @code{emacs-pass}, a major mode for @code{pass}.
+@item @code{auth-source-pass.el}: integration of Emacs' auth-source with
+@code{pass}, included in Emacs 26+).
+@end itemize\n")
+      (license license:gpl3+))))